adding new protocol (draft)

client/electrum

@@ -20,7 +20,6 @@ import re, sys, getpass
 
 from optparse import OptionParser
 from wallet import Wallet, SecretToASecret
-from interface import Interface
 from decimal import Decimal
 
 
@@ -43,11 +42,13 @@ if __name__ == '__main__':
     parser.add_option("-r", "--remote", dest="remote_url", default=None, help="URL of a remote wallet")
     options, args = parser.parse_args()
 
-    interface = Interface()
+    wallet = Wallet()
-    wallet = Wallet(interface)
     wallet.set_path(options.wallet_path)
+    wallet.read()
     wallet.remote_url = options.remote_url
 
+    interface = wallet.interface
+
     if len(args)==0:
         url = None
         cmd = 'gui'
@@ -71,7 +72,7 @@ if __name__ == '__main__':
         gui = gui.ElectrumGui(wallet)
 
         try:
-            found = wallet.read()
+            found = wallet.file_exists
             if not found:
                 found = gui.restore_or_create()
         except BaseException, e:
@@ -90,14 +91,14 @@ if __name__ == '__main__':
     if cmd not in known_commands:
         cmd = 'help'
 
-    if not wallet.read() and cmd not in ['help','create','restore']:
+    if not wallet.file_exists and cmd not in ['help','create','restore']:
         print "Wallet file not found."
         print "Type 'electrum.py create' to create a new wallet, or provide a path to a wallet with the -d option"
         sys.exit(0)
     
     if cmd in ['create', 'restore']:
         import mnemonic
-        if wallet.read():
+        if wallet.file_exists:
             print "remove the existing wallet first!"
             sys.exit(0)
         password = getpass.getpass("Password (hit return if you do not wish to encrypt your wallet):")

client/interface.py

@@ -20,7 +20,7 @@
 import random, socket, ast
 
         
-import thread, traceback, sys, time
+import thread, traceback, sys, time, json
 
 DEFAULT_TIMEOUT=5
 
@@ -32,22 +32,49 @@ class Interface:
         self.rtime = 0
         self.blocks = 0 
         self.message = ''
-        self.set_port(50000)
         self.is_connected = False
         self.was_updated = True # fixme: use a semaphore
         self.was_polled = False # True after the first poll
 
-    def set_port(self, port_number):
+    def send_tx(self, data):
-        self.port = port_number
+        out = self.handler('blockchain.transaction.broadcast', data )
-        if self.use_http():
+        return out
-            self.handler = self.http_json_handler
-        else:
-            self.handler = self.native_handler
 
-    def use_http(self): 
+    def retrieve_history(self, address):
-        return self.port in [80,81,8080,8081]
+        out = self.handler('blockchain.address.get_history', address )
+        return out
 
-    def native_handler(self, method, params = ''):
+    def get_servers(self):
+        thread.start_new_thread(self.update_servers_thread, ())
+
+    def set_server(self, host, port):
+        if host!= self.host or port!=self.port:
+            self.host = host
+            self.port = port
+            self.is_connected = False
+
+    def update_servers_thread(self):
+        pass
+
+
+class NativeInterface(Interface):
+    """This is the original Electrum protocol. It uses polling, and a non-persistent tcp connection"""
+
+    def __init__(self, host=None, port=50000):
+        Interface.__init__(self)
+        if host: self.host = host
+        self.port = port
+
+    def new_session(self, addresses, version):
+        self.was_polled = False
+        out = self.handler('session.new', [ version, addresses ] )
+        self.session_id, self.message = ast.literal_eval( out )
+
+    def update_session(self, addresses):
+        out = self.handler('session.update', [ self.session_id, addresses ] )
+        return out    
+
+    def handler(self, method, params = ''):
         import time
         cmds = {'session.new':'new_session',
                 'peers':'peers',
@@ -76,69 +103,8 @@ class Interface:
             out = ast.literal_eval( out )
         return out
 
-    def http_json_handler(self, method, params = []):
-        import urllib2, json, time
-        if type(params) != type([]): params = [ params ]
-        t1 = time.time()
-        data = { 'method':method, 'id':'jsonrpc', 'params':params }
-        data_json = json.dumps(data)
-        host = 'http://%s:%d'%( self.host if cmd!='peers' else self.peers_server, self.port )
-        req = urllib2.Request(host, data_json, {'content-type': 'application/json'})
-        response_stream = urllib2.urlopen(req)
-        response = json.loads( response_stream.read() )
-        out = response.get('result')
-        if not out:
-            print response
-        self.rtime = time.time() - t1
-        self.is_connected = True
-        return out
-
-    def send_tx(self, data):
-        out = self.handler('blockchain.transaction.broadcast', data )
-        return out
-
-    def retrieve_history(self, address):
-        out = self.handler('blockchain.address.get_history', address )
-        return out
-
-    def poll(self):
-        out = self.handler('session.poll', self.session_id )
-        blocks, changed_addr = ast.literal_eval( out )
-        if blocks == -1: raise BaseException("session not found")
-        self.blocks = int(blocks)
-        if changed_addr: self.was_updated = True
-        self.was_polled = True
-        return changed_addr
-
-    def new_session(self, addresses, version):
-        self.was_polled = False
-        out = self.handler('session.new', [ version, addresses ] )
-        self.session_id, self.message = ast.literal_eval( out )
-
-    def update_session(self, addresses):
-        out = self.handler('session.update', [ self.session_id, addresses ] )
-        return out
-    
-    def update_servers_thread(self):
-        # if my server is not reachable, I should get the list from one of the default servers
-        # requesting servers could be an independent process
-        while True:
-            for server in self.default_servers:
-                try:
-                    self.peers_server = server
-                    out = self.handler('peers')
-                    self.servers = map( lambda x:x[1], out )
-                    # print "Received server list from %s" % self.peers_server, out
-                    break
-                except socket.timeout:
-                    continue
-                except socket.error:
-                    continue
-
-            time.sleep(5*60)
-
     def poll_interval(self):
-        return 15 if self.use_http() else 5
+        return 5
 
     def update_wallet(self, wallet):
         is_new = False
@@ -158,6 +124,15 @@ class Interface:
         else:
             return False
 
+    def poll(self):
+        out = self.handler('session.poll', self.session_id )
+        blocks, changed_addr = ast.literal_eval( out )
+        if blocks == -1: raise BaseException("session not found")
+        self.blocks = int(blocks)
+        if changed_addr: self.was_updated = True
+        self.was_polled = True
+        return changed_addr
+
     def update_wallet_thread(self, wallet):
         while True:
             try:
@@ -195,15 +170,89 @@ class Interface:
                     traceback.print_exc(file=sys.stdout)
                     break
                 
-
     def start(self, wallet):
         thread.start_new_thread(self.update_wallet_thread, (wallet,))
 
-    def get_servers(self):
+    def update_servers_thread(self):
-        thread.start_new_thread(self.update_servers_thread, ())
+        # if my server is not reachable, I should get the list from one of the default servers
+        # requesting servers could be an independent process
+        while True:
+            for server in self.default_servers:
+                try:
+                    self.peers_server = server
+                    out = self.handler('peers')
+                    self.servers = map( lambda x:x[1], out )
+                    # print "Received server list from %s" % self.peers_server, out
+                    break
+                except socket.timeout:
+                    continue
+                except socket.error:
+                    continue
+                except:
+                    traceback.print_exc(file=sys.stdout)
 
-    def set_server(self, host, port):
+            time.sleep(5*60)
-        if host!= self.host or port!=self.port:
+
-            self.host = host
+
-            self.set_port( port )
+
-            self.is_connected = False
+
+class TCPInterface(Interface):
+    """json-rpc over TCP"""
+
+    def __init__(self, host=None, port=50001):
+        Interface.__init__(self)
+        if host: self.host = host
+        self.port = 50001
+        self.s = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
+        self.s.connect(( self.host, self.port))
+
+    def send(self, cmd, params = []):
+        request = json.dumps( { 'method':cmd, 'params':params } )
+        self.s.send( request + '\n' )
+
+    def listen_thread(self, wallet):
+        out = ''
+        while True:
+            msg = self.s.recv(1024)
+            out += msg
+            s = out.find('\n')
+            if s!=-1:
+                c = out[0:s]
+                out = out[s+1:]
+                c = json.loads(c)
+                cmd = c.get('method')
+                if cmd == 'server.banner':
+                    self.message = c.get('result')
+                else:
+                    print "received message:", c
+                               
+    def start(self, wallet):
+        thread.start_new_thread(self.listen_thread, (wallet,))
+        self.send('client.version', wallet.electrum_version)
+        self.send('server.banner', None)
+        for address in wallet.all_addresses():
+            self.send('blockchain.address.subscribe', address)
+    
+
+
+class HttpInterface(Interface):
+
+    def __init__(self):
+        self.port = 8081
+
+    def handler(self, method, params = []):
+        import urllib2, json, time
+        if type(params) != type([]): params = [ params ]
+        t1 = time.time()
+        data = { 'method':method, 'id':'jsonrpc', 'params':params }
+        data_json = json.dumps(data)
+        host = 'http://%s:%d'%( self.host if cmd!='peers' else self.peers_server, self.port )
+        req = urllib2.Request(host, data_json, {'content-type': 'application/json'})
+        response_stream = urllib2.urlopen(req)
+        response = json.loads( response_stream.read() )
+        out = response.get('result')
+        if not out:
+            print response
+        self.rtime = time.time() - t1
+        self.is_connected = True
+        return out

client/remote_wallet.py

@@ -21,7 +21,6 @@ import time, thread, sys, socket
 # see http://code.google.com/p/jsonrpclib/
 import jsonrpclib
 from wallet import Wallet
-from interface import Interface
 
 """
 Simple wallet daemon for webservers.
@@ -41,8 +40,7 @@ port = 8444
 wallet_path = 'wallet_path'
 username = 'foo'
 password = 'bar'
-interface = Interface()
+wallet = Wallet()
-wallet = Wallet(interface)
 stopping = False
 
 

client/wallet.py

@@ -234,7 +234,7 @@ from version import ELECTRUM_VERSION, SEED_VERSION
 
 
 class Wallet:
-    def __init__(self, interface):
+    def __init__(self):
 
         self.electrum_version = ELECTRUM_VERSION
         self.seed_version = SEED_VERSION
@@ -262,7 +262,6 @@ class Wallet:
         self.tx_history = {}
 
         self.imported_keys = {}
-        self.interface = interface
         self.remote_url = None
 
 
@@ -541,23 +540,27 @@ class Wallet:
         f.close()
 
     def read(self):
+        from interface import NativeInterface, HttpInterface,TCPInterface
+
         upgrade_msg = """This wallet seed is deprecated. Please run upgrade.py for a diagnostic."""
+        self.file_exists = False
         try:
             f = open(self.path,"r")
             data = f.read()
             f.close()
         except:
-            return False
+            self.interface = NativeInterface()
+            return
         try:
             d = ast.literal_eval( data )
             self.seed_version = d.get('seed_version')
             self.master_public_key = d.get('master_public_key').decode('hex')
             self.use_encryption = d.get('use_encryption')
             self.fee = int( d.get('fee') )
-            self.interface.host = d.get('host')
-            self.interface.set_port( d.get('port') )
-            self.interface.blocks = d.get('blocks')
             self.seed = d.get('seed')
+            host = d.get('host')
+            port = d.get('port')
+            blocks = d.get('blocks')
             self.addresses = d.get('addresses')
             self.change_addresses = d.get('change_addresses')
             self.status = d.get('status')
@@ -569,7 +572,7 @@ class Wallet:
             self.authorities = d.get('authorities',{})
             self.receipts = d.get('receipts',{})
         except:
-            raise BaseException(upgrade_msg)
+            raise BaseException("cannot read wallet file")
 
         self.update_tx_history()
 
@@ -578,7 +581,17 @@ class Wallet:
 
         if self.remote_url: assert self.master_public_key.encode('hex') == self.get_remote_mpk()
 
-        return True
+        self.file_exists = True
+
+        if port == 50000:
+            self.interface = NativeInterface(host,port)
+        elif port == 50001:
+            self.interface = TCPInterface(host,port)
+        elif port in [80,8080,81,8181]:
+            self.interface = HttpInterface(host,port)            
+        else:
+            raise BaseException("unknown protocol: %d"%port)
+
         
     def get_new_address(self):
         n = 0